First stage pressure reducing valve having a tubular plug,...

Details First stage pressure reducing valve having a tubular plug,... First stage pressure reducing valve having a tubular plug,...

2003-05-30

2008-07-15

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Ambient condition change responsive

Atmospheric

C137S338000, C165S067000

Reexamination Certificate

active

07398794

ABSTRACT:
The invention relates to a first stage pressure reducing valve having a tubular plug, particularly for regulators of scuba breathing apparatus. According to the invention, at least a portion of the outer surface of the valve has fins (19, 19′) for heat exchange with the outside environment, designed to prevent or reduce the formation of ice (18) caused by the temperature drop generated by gas expansion inside the valve.

REFERENCES:
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patent: 3411746 (1968-11-01), Scaramucci
patent: 3548862 (1970-12-01), Teruo et al.
patent: 3924619 (1975-12-01), Banjavich et al.
patent: 4967780 (1990-11-01), Minami
patent: 5097860 (1992-03-01), Ferguson et al.
patent: 5265596 (1993-11-01), Sauze
patent: 5685297 (1997-11-01), Schuler
patent: 0512887 (1992-11-01), None
patent: WO 01/10709 (2001-02-01), None

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